echinomastus johnsonii (sclerocactus), rare species of rock desert cactus

usa nature succulent cactus cacti cactaceae eudicots caryophyllales cactoideae cacteae wildlife flora plant desert spines arid landscape natural vegetation weather hot dry spine prickly pear hardy botany purple tree water wild background johnson 039 fishhook beehive echinomastus johnsonii spiny breast sclerocactus